EP 0996751 A1 20000503 - METHOD FOR PERFORMING A HEAT TREATMENT ON METALLIC RINGS, AND BEARING RING THUS OBTAINED
Title (en)
METHOD FOR PERFORMING A HEAT TREATMENT ON METALLIC RINGS, AND BEARING RING THUS OBTAINED
Title (de)
VERFAHREN ZUM WÄRMEBEHANDELN VON METALLISCHE RINGEN UND ALSO HERGESTELLTE LAGERRINGEN
Title (fr)
PROCEDE D'EXECUTION D'UN TRAITEMENT THERMIQUE SUR DES BAGUES METALLIQUES, ET BAGUES DE ROULEMENT AINSI OBTENUES
Publication
Application
Priority
- NL 9800400 W 19980710
- NL 1006539 A 19970710
Abstract (en)
[origin: WO9902744A1] In a method and apparatus for performing a heat treatment on steel rings, in particular for bearings, the outer surface and the inner surface of a preheated ring are exposed to different flows of a cooling medium such that the regions of those surfaces are subjected to different cooling processes. The flow supply is controlled in such a way that a desired internal stress pattern is obtained in said ring by controlling the propagation of phase transformation from austenite to martensite or bainite material structure.
IPC 1-7
IPC 8 full level
C21D 1/667 (2006.01); C21D 1/673 (2006.01); C21D 9/40 (2006.01); F16C 33/62 (2006.01); F16C 33/64 (2006.01); C21D 11/00 (2006.01)
CPC (source: EP KR US)
C21D 1/667 (2013.01 - EP KR US); C21D 9/40 (2013.01 - EP KR US); C21D 11/005 (2013.01 - KR); F16C 33/64 (2013.01 - EP KR US); C21D 1/673 (2013.01 - EP US); C21D 11/00 (2013.01 - EP US); C21D 2211/002 (2013.01 - KR); C21D 2211/008 (2013.01 - KR); Y10S 148/906 (2013.01 - EP US)
Citation (search report)
See references of WO 9902744A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9902744 A1 19990121; AU 8465098 A 19990208; CN 1106451 C 20030423; CN 1262709 A 20000809; DE 69808916 D1 20021128; DE 69808916 T2 20030911; EP 0996751 A1 20000503; EP 0996751 B1 20021023; JP 2001509547 A 20010724; KR 20010021589 A 20010315; NL 1006539 C2 19990112; US 6585834 B1 20030701
DOCDB simple family (application)
NL 9800400 W 19980710; AU 8465098 A 19980710; CN 98807062 A 19980710; DE 69808916 T 19980710; EP 98935386 A 19980710; JP 2000502234 A 19980710; KR 20007000147 A 20000107; NL 1006539 A 19970710; US 44672800 A 20000209